Leviticus 18:15
You shall not uncover the nakedness of your daughter-in-law; she is your son's wife, you shall not uncover her nakedness.
Leviticus 20:12
If a man lies with his daughter-in-law, both of them shall surely be put to death; they have committed perversion; their blood is upon them.
Genesis 38:26
Then Judah identified them and said, "She is more righteous than I, since I did not give her to my son Shelah." And he did not know her again.
Ezekiel 22:11
One commits abomination with his neighbor's wife; another lewdly defiles his daughter-in-law; another in you violates his sister, his father's daughter.
Genesis 38:18-19
He said, "What pledge shall I give you?" She replied, "Your signet and your cord and your staff that is in your hand." So he gave them to her and went in to her, and she conceived by him.